The Fourth Dimension (1936)

Right after I watch the movie Deja Vu there’s a “Deja Vu” title card in It’s Not Me, then the first Painleve film I find is showing time as an image flipbook and imagining that higher-dimensional beings can change pages at will. Pretty dry science film but it’s fun that scientists have always been excited about time travel.

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The Octopus (1927)

Pretty random assortment of live and dead octopus…
Great doc, because octupusus are great.

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Sea Urchins (1929)

More cool sea creatures which become increasingly disturbing as you learn more about them, zooming into their spiny surface to discover a horrid living forest of waggling suckers and claws

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Daphnia (1928)

Nothing cool or cute about the microshrimp “water fleas,” ghastly transparent insectoid monsters, silently battling their nemesis The Hydra by the million in every lake and pond.

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Freshwater Assassins (1947)

This one has sound – enjoy some swinging horn jazz while underwater insects munch on even smaller insects, 24 minutes of weird shrimpies chowing down on each other.